Update to use static backup service for GIS address points for demo purpose

The live SAM GIS layer may be unstable so I wanted to try using the more
stable, but static version of this for searching nearby addresses.
Merge pull request #31 from sam-berg/master

Update to use static backup service for GIS address points for demo purp...
Merge pull request #32 from AndrewArace/gh-pages

Merge pull request #30 from AndrewArace/master
Merge pull request #33 from AndrewArace/master

use backup GIS layer nearby search